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Maps and Registers
ATCA-7370/ATCA-7370-S Installation and Use (6806800P54G)
145
When bits 0, 1, 2, or 3 are set to logic 1, a Modem Status interrupt is generated if bit 3 of the
Interrupt Enable Register is set.
Table 6-38 Modem Status Register (MSR)
LPC IO Address: Base + 6
Bit
Description
Default
Access
0
Change in clear-to-send (DCTS) indicator
DCTS indicates that the CTS# input has
changed state since the last time it was read
by the CPU. When DCTS is set (autoflow
control is not enabled and the modem status
interrupt is enabled), a modem status
interrupt is generated. When autoflow
control is enabled (DCTS is cleared), no
interrupt is generated:
1: Change in state of CTS# input since last
read
0: No change in state of CTS# input since last
read
0
LPC: r/w
1
Change in data set ready (DDSR) indicator
DDSR indicates that the DSR# input has
changed state since the last time it was read
by the CPU. When DDSR is set and the
modem status interrupt is enabled, a modem
status interrupt is generated:
1: Change in state of DSR# input since last
read
0: No change in state of DSR# input since last
read
0
LPC: r/w
2
Trailing edge of the ring indicator (TERI)
detector
TERI indicates that the RI# input to the chip
has changed from a low to a high level. When
TERI is set and the modem status interrupt is
enabled, a modem status interrupt is
generated. Not supported.
0
LPC: r/w
Summary of Contents for ATCA-7370
Page 1: ...ATCA 7370 ATCA 7370 S Installation and Use P N 6806800P54G September 2014 ...
Page 16: ...ATCA 7370 ATCA 7370 S Installation and Use 6806800P54G 16 List of Tables ...
Page 18: ...ATCA 7370 ATCA 7370 S Installation and Use 6806800P54G 18 List of Figures ...
Page 30: ...ATCA 7370 ATCA 7370 S Installation and Use 6806800P54G Safety Notes 30 ...
Page 36: ...ATCA 7370 ATCA 7370 S Installation and Use 6806800P54G Sicherheitshinweise 36 ...
Page 74: ...Controls Indicators and Connectors ATCA 7370 ATCA 7370 S Installation and Use 6806800P54G 74 ...
Page 102: ...BIOS ATCA 7370 ATCA 7370 S Installation and Use 6806800P54G 102 ...
Page 246: ...Firmware Upgrade ATCA 7370 ATCA 7370 S Installation and Use 6806800P54G 246 ...
Page 248: ...Troubleshooting ATCA 7370 ATCA 7370 S Installation and Use 6806800P54G 248 ...
Page 250: ...Related Documentation ATCA 7370 ATCA 7370 S Installation and Use 6806800P54G 250 ...
Page 251: ......